INSERT INTO users (username, password_hash) VALUES ('ben', 'hash1'), ('jan', 'hash2'), ('piet', 'hash3'); INSERT INTO rooms (name, owner_id, invite_code) VALUES ('Vriendengroep', 1, 'ABC123'), ('Projectgroep', 2, 'XYZ789'); INSERT INTO room_members (room_id, user_id, role) VALUES (1, 1, 'owner'), (1, 2, 'member'), (1, 3, 'member'), (2, 2, 'owner'); INSERT INTO events ( room_id, creator_id, type, title, description, start_time, end_time, visibility, status, min_people ) VALUES ( 1, 1, 'proposal', 'Bowlen', 'Avondje bowlen', '2026-08-10 19:00', '2026-08-10 22:00', 'room', 'proposed', 3 ); INSERT INTO event_signups (event_id, user_id, status) VALUES (1, 1, 'going'), (1, 2, 'going');